#include <iostream>
#include <string>
#include <cctype>
using namespace std;

int main()
{
	string s;
	getline(cin, s);
	for(int i = 0; i < s.size(); i++)
	{
		if(isalpha(s[i]))
		{
			if(s[i] == 'a' || s[i] == 'A')
				s[i] += 25;
			else
				s[i] -= 1;
		}
		else
			continue;
	}
	cout << s << endl;
	return 0; 
}
